you tripped him
... Go back 10 yards 离开10码（9.15米） You tripped him 你绊他 The ball must be stationary 求必须放定 ...
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克兰西为此解释到，这对那些不善于跳绳的人来说是个绝佳的锻炼工具。他说：“经常跳绳可以让你的四肢得到充分活动，也有助于心血管的运动，而使用无绳跳绳你就不用担心被绳索绊着而终止跳跃。”
if you are still jumping, you're still using your legs as well as your arms, and getting the cardiovascular workout. you just don't have to worry about tripping on the rope.
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